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Oxygen evolution electrocatalytic properties of La substituted Na0.74CoO2 synthesized by sol-gel route.

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Title: Oxygen evolution electrocatalytic properties of La substituted Na0.74CoO2 synthesized by sol-gel route.
Authors: Labidi, Chams Edoha1 (AUTHOR), Omari, Mahmoud1 (AUTHOR) m.omari@univ-biskra.dz, Omari, Elies1 (AUTHOR), Mebarki, Mourad2 (AUTHOR)
Source: Ceramics International. May2026:Part A, Vol. 52 Issue 13, p22002-22011. 10p.
Subjects: Electrocatalysts, Oxygen evolution reactions, Sol-gel processes, Water electrolysis, Electrochemical analysis, Lanthanum compounds
Abstract: This work focuses on developing highly effective and stable electrocatalysts for the oxygen evolution reaction, with the objective of contributing to solutions for current energy and environmental challenges. A-series La-substituted sodium cobaltate materials (0 ≤ x ≤ 0.3) were prepared using the sol-gel technique to examine the influence of A-site substitution on their electrocatalytic performance. XRD examination verifies the preservation of a hexagonal structure, with secondary phases emerging in the doped samples. The materials display a layered micro-plate morphology characterized by irregular forms and agglomerated powders. The NLC10 electrocatalyst exhibits remarkable OER performance, characterized by a low overpotential of 260 mV at 10 mA cm−2, a Tafel slope of 120 mV.dec−1, and remarkable stability over a duration of 20 h. The exceptional electrochemical properties of NLC10 highlight its potential as a promising electrocatalyst for future water-splitting applications. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Oxygen evolution electrocatalytic properties of La substituted Na0.74CoO2 synthesized by sol-gel route.
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  Data: <searchLink fieldCode="AR" term="%22Labidi%2C+Chams+Edoha%22">Labidi, Chams Edoha</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Omari%2C+Mahmoud%22">Omari, Mahmoud</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> m.omari@univ-biskra.dz</i><br /><searchLink fieldCode="AR" term="%22Omari%2C+Elies%22">Omari, Elies</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mebarki%2C+Mourad%22">Mebarki, Mourad</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. May2026:Part A, Vol. 52 Issue 13, p22002-22011. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Electrocatalysts%22">Electrocatalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+evolution+reactions%22">Oxygen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Sol-gel+processes%22">Sol-gel processes</searchLink><br /><searchLink fieldCode="DE" term="%22Water+electrolysis%22">Water electrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+analysis%22">Electrochemical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Lanthanum+compounds%22">Lanthanum compounds</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This work focuses on developing highly effective and stable electrocatalysts for the oxygen evolution reaction, with the objective of contributing to solutions for current energy and environmental challenges. A-series La-substituted sodium cobaltate materials (0 ≤ x ≤ 0.3) were prepared using the sol-gel technique to examine the influence of A-site substitution on their electrocatalytic performance. XRD examination verifies the preservation of a hexagonal structure, with secondary phases emerging in the doped samples. The materials display a layered micro-plate morphology characterized by irregular forms and agglomerated powders. The NLC10 electrocatalyst exhibits remarkable OER performance, characterized by a low overpotential of 260 mV at 10 mA cm−2, a Tafel slope of 120 mV.dec−1, and remarkable stability over a duration of 20 h. The exceptional electrochemical properties of NLC10 highlight its potential as a promising electrocatalyst for future water-splitting applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.ceramint.2026.03.269
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 22002
    Subjects:
      – SubjectFull: Electrocatalysts
        Type: general
      – SubjectFull: Oxygen evolution reactions
        Type: general
      – SubjectFull: Sol-gel processes
        Type: general
      – SubjectFull: Water electrolysis
        Type: general
      – SubjectFull: Electrochemical analysis
        Type: general
      – SubjectFull: Lanthanum compounds
        Type: general
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      – TitleFull: Oxygen evolution electrocatalytic properties of La substituted Na0.74CoO2 synthesized by sol-gel route.
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            NameFull: Labidi, Chams Edoha
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            NameFull: Omari, Mahmoud
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            NameFull: Omari, Elies
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            NameFull: Mebarki, Mourad
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              M: 05
              Text: May2026:Part A
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              Y: 2026
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